The cable I have has a part number of 182323-10M (circa 1995). It has a 50-pin female connector of some sort (original) on the NB-MIO side and a standard 68-pin connector on the SCXI side.
What is the newer multifunction board that you are looking into?
I'm trying to consider options, so there's several, mostly low end multifunction boards. For example:
There is not such and adapter as far as I know, but you can just get a 68 pin cable to connect your controller board to the SCXI 1000. For example you can use one of our SHC 68-68 cables to connect your SCXI 1000 with any of our 62xx series boards.